If you can, there should be an icon of Christ on the right, and of Mary with the Christ child on the left, with a Cross in the center. The icon corner should face east. Icon corners also may contain additional icons, a Bible, incense, candles, holy water, holy oil, etc. BUT, every house should have one.

This is Dr. Alex Roman's take on Icon Corners, placement and such, it's a bit long. I'll keep googling.